Dual Jet System

ABSTRACT

Provided is a dual jet system mounted at a bottom end of a reservoir in a fuel pump module, and more particularly, to a fuel pump module mounted with a dual jet system capable of preventing a phenomenon that fuel is not smoothly filled in a reservoir due to fuel inclined to one side caused by an inclination of a fuel tank when a vehicle travels a steep slope section by mounting two jet pumps at both edges of a bottom end of a reservoir.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority under 35 U.S.C. §119 to Korean Patent Application No. 10-2010-0032704, filed on Apr. 09, 2010, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to a dual jet system mounted at a bottom end of a reservoir in a fuel pump module, and more particularly, to a fuel pump module mounted with a dual jet system capable of preventing a phenomenon that fuel is not smoothly filled in a reservoir due to fuel inclined to one side caused by an inclination of a fuel tank when a vehicle travels a steep slope section by mounting two jet pumps at both edges of a bottom end of a reservoir.

BACKGROUND

Generally, a fuel supply apparatus of a vehicle is a fuel apparatus of a vehicle driven by being supplied with liquid fuel, like a gasoline engine or a diesel engine. The fuel supply apparatus is an apparatus of supplying fuel that is necessary for the engine to start in a state in which the fuel is most easily combusted under any operation conditions and performs a function of largely affecting output or fuel efficiency of a vehicle, or the like.

The fuel supply apparatus is configured to include a fuel tank storing fuel and a fuel pump module 1 supplying or recovering the fuel in the fuel tank to the engine or a fuel jetting apparatus.

Generally, the fuel pump module is configured to include a flange assembly 10, a reservoir body assembly 30, and a guide rod 20 connecting the flange assembly 10 to the reservoir body assembly 30, as shown in FIG. 1.

FIG. 1 shows a fuel pump module 1 jetting the fuel recovered from an internal combustion engine into a reservoir 31 and using the fuel as a working fluid so as to fill the fuel in the fuel tank in the reservoir 31.

The flange assembly 10 is fixed to an inlet portion of the fuel tank and the reservoir body assembly 30 is disposed at the bottom of the fuel tank.

The reservoir body assembly 30 is configured to largely include the reservoir 31, a fuel pump 32 mounted in the reservoir 31, an intank filter 33, and a jet pump 40.

The reservoir 31 has a container shape and is a reservoir to stably supply a predetermined amount of fuel filled therein to an engine.

The fuel pump 32 mounted in the reservoir 31 sucks the fuel filled in the reservoir 31 and constantly supplies the sucked fuel to an internal combustion engine.

The jet pump 40 jets fuel into the reservoir 31 to inject the fuel in the fuel tank into the reservoir 31 by the jetted fuel.

Further, the guide tube 41 mounted at the top of the jet pump 40 in the reservoir 31 fills the fuel injected the reservoir 31 by the jet pump 40 in the reservoir 31 to prevent the fuel in the reservoir 31 from discharging to the outside.

As described above, the jet pump 40 jets the fuel into the reservoir 31 to inject the fuel in the fuel tank into the reservoir 31 by the jetted fuel. As shown in FIG. 1, the reservoir 31 is filled by dividing high-pressure fuel injected into the engine from the fuel pump module 1.

The fuel is jetted into the reservoir 31 at high speed by the jet pump 40, such that flow velocity around the jet orifice 42 is increased, while pressure is lowered.

Therefore, the fuel in the fuel tank is naturally injected into the jet orifice 42 to inject the fuel jetted from the jet orifice 42 into the reservoir 31.

However, a case in which the fuel is not smoothly filled in the reservoir 31 through the jet pump 40 under adverse conditions such as when a vehicle stops on a steep slope in a low fuel state or when a vehicle is sharply turned.

When the vehicle waits for a long period of time while in the engine starting state on the steep slope in the low fuel state or is sharply turned while the vehicle is traveling in the low fuel state, an inlet capable of sucking the fuel into the jet pump 40 is separated from the fuel surface of the fuel tank, such that the fuel of the fuel tank cannot be sucked into the reservoir.

Therefore, the engine hesitation and stop phenomena of the vehicle occur due to the fuel insufficiently supplied to the engine.

SUMMARY

An embodiment of the present is directed to provide a fuel pump module capable of preventing a phenomenon that fuel is not smoothly filled in a reservoir due to an orifice action of a jet pump by inclining fuel to one side that is caused by an inclination of a fuel tank when a vehicle travels a steep slope section.

Another embodiment of the present disclosure is directed to provide a fuel pump module capable of increasing fuel supply efficiency of a vehicle by preventing engine hesitation and stop phenomena of a vehicle caused by insufficiently supplying fuel to an engine since fuel is not previously filled in a reservoir.

In one general aspect, there is provided a fuel pump module 1000 mounted in a fuel tank of a vehicle and supplying a predetermined amount of fuel filled therein to an engine, wherein a dual jet system 400 mounted on a bottom end of a reservoir 310 of the fuel pump module 1000 includes: a main jet pump housing 510 interconnected with at least one first jet orifice 520 and a cylindrical check valve sealing part 530 by a hollow communicating tube 550, at least one first jet orifice 520 jetting the fuel into the reservoir 310 formed at one side of the dual jet system 400 so as to be protruded upward, the cylindrical hollow check valve sealing part 530 formed to be protruded upward while being adjacent to the first jet orifice 520 so that an anti siphon check valve assembly 580 preventing a siphon phenomenon and a reflow of fuel caused at the time of supplying the fuel to the reservoir 310 is inserted into the cylindrical check valve sealing part 530; and a sub-jet pump housing 610 provided with a second jet orifice 620 formed to be protruded upward in order to jet the fuel into the reservoir 310, wherein the bottom side of the reservoir 310 is provided with a coupling groove 800 corresponding to the top side of the dual jet system 400 so that the top surface of the dual jet system 400 may be inserted into the bottom side of the reservoir 310 to be coupled with each other.

The dual jet system 400 may include an outlet pipe 540 protrudedly formed at an outer circumferential surface of the check valve sealing part 530 and an inlet pipe 630 protrudedly formed at an outer circumferential surface of the sub-jet pump housing 610, wherein the outlet pipe 540 and the inlet pipe 630 may be interconnected by a connection tube 700.

The main jet pump housing 510 may be mounted to be adjacent to one edge of the bottom side of the reservoir 310 and the sub-jet pump housing 610 may be mounted to be adjacent to the other edge of the bottom side of the reservoir 310, wherein the main jet pump housing 510 and the sub-jet pump housing 610 are mounted to be opposite to each other.

The top side of the communicating tube 550 may be provided with a first gap forming part 560 formed to be protruded upward.

The main jet pump housing 510 may be provided with a second gap forming part 570 so that the first gap forming part 560 extends in a width direction of the communicating tube 550, wherein the second gap forming part 570 is formed to be extended longer than the width of the main jet pump housing 510.

The sub-jet pump housing 610 may be provided with a third gap forming part 640 protruded in a horizontal direction from one predetermined area and the other predetermined area of the outer peripheral surface thereof to extend in a direction opposite to each other, wherein the third gap forming part 640 is formed to be extended longer than the width of the sub-jet pump housing 610.

Both ends of the second gap forming part 570 and the third gap forming part 640 may be provided with a protrusion part 571 protruded to the outside in a length direction and the predetermined area of the inner circumferential surface of the coupling groove 800 may be provided with an insertion groove 810 corresponding to the protrusion part 571 so as to be fastened to the protrusion part 571.

Other features and aspects will be apparent from the following detailed description, the drawings, and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic cross-sectional view showing a fuel pump module according to the related art;

FIG. 2 is a perspective view showing a reservoir and a jet pump of the fuel pump module according to the related art;

FIG. 3 is a perspective view showing the jet pump of the fuel pump module according to the related art;

FIG. 4 is a schematic cross-sectional view showing a fuel pump module according to the present discloure;

FIG. 5 is a perspective view showing a reservoir and a dual jet system of the fuel pump module according to the present disclosure;

FIG. 6 is a schematic cross-sectional view showing a state in which the fuel pump module according to the present disclosure is inclined;

FIG. 7 is a perspective view showing a main jet pump of the fuel pump module according to the present disclosure;

FIG. 8 is a perspective view showing a sub-jet pump of the fuel pump module according to the present disclosure; and

FIG. 9 is a cross-sectional view showing the main jet pump of the fuel pump module according to the present disclosure.

DETAILED DESCRIPTION OF MAIN ELEMENTS

1000: FUEL PUMP MODULE  100: FLANGE ASSEMBLY  200: GUIDE ROD  300: RESERVOIR ASSEMBLY  310: RESERVOIR 320: FUEL PUMP  330: INTANK FILTER  400: DUAL JET SYSTEM  410: GUIDE TUBE  500: MAIN JET PUMP  510: MAIN JET PUMP HOUSING 520: FIRST JET ORIFICE  530: CHECK VALVE SEALING PART 540: OUTLET PIPE  550: COMMUNICATING TUBE 560: FIRST GAP FORMING PART  570: SECOND GAP FORMING PART 571: PROTRUSION PART  580: ANTI SIPHON CHECK VALVE ASSEMBLY  590: JET PUMP FILTER  600: SUB-JET PUMP  610: SUB-JET PUMP HOUSING 620: SECOND JET ORIFICE  630: INLET PIPE 640: THIRD GAP FORMING PART  700: CONNECTION TUBE  800: COUPLING GROOVE  810: INSERTION GROOVE

DETAILED DESCRIPTION OF EMBODIMENTS

The advantages, features and aspects of the present disclosure will become apparent from the following description of the embodiments with reference to the accompanying drawings, which is set forth hereinafter. The present disclosure may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a,” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Hereinafter, a fuel pump module 1000 according to the present disclosure having the above-mentioned characteristics will be described in more detail with reference to the accompanying drawings.

FIG. 1 is a schematic cross-sectional view showing a fuel pump module according to the related art, FIG. 2 is a perspective view showing a reservoir and a jet pump of the fuel pump module according to the related art, FIG. 3 is a perspective view showing the jet pump of the fuel pump module according to the related art, FIG. 4 is a schematic cross-sectional view showing a fuel pump module according to the present disclosure, FIG. 5 is a perspective view showing a reservoir and a dual jet system of the fuel pump module according to the present disclosure, FIG. 6 is a schematic cross-sectional view showing a state in which the fuel pump module according to the present disclosure is inclined, FIG. 7 is a perspective view showing a main jet pump of the fuel pump module according to the present disclosure, FIG. 8 is a perspective view showing a sub-jet pump of the fuel pump module according to the present disclosure, and FIG. 9 is a cross-sectional view showing the main jet pump of the fuel pump module according to the present disclosure.

The present disclosure relates to a dual jet system 400 mounted in a fuel pump module 1000 that is mounted in a fuel tank and supplies a predetermined amount of fuel filled therein to an engine.

Referring to FIG. 4, the present disclosure includes the fuel pump module 1000 that is mounted in the fuel tank and supplies the fuel to the engine.

The fuel pump module 1000 is configured to include a reservoir body assembly 300 and a flange assembly 100, wherein the flange assembly 100 is fixed to the fuel tank and the reservoir body assembly 300 is fixed to a guide rod 200 extendedly formed from the flange assembly 100, thereby forming the fuel pump module 1000.

The reservoir body assembly 300 is configured to include a reservoir 310, a fuel pump 320 mounted in the reservoir 310, an intank filter 330, and the dual jet system 400.

The reservoir 310 has a container shape and is mounted to be seated on a bottom surface of the fuel tank and is to stably supply a predetermined amount of fuel filled therein to an engine.

The fuel pump 320 mounted in the reservoir 310 sucks the fuel filled in the reservoir 310 and constantly supplies the sucked fuel to an internal combustion engine.

The dual jet system 400 jets fuel into the reservoir 310 to inject the fuel in the fuel tank into the reservoir 310 by the jetted fuel.

In addition, the guide tube 410 mounted at the top of the dual jet system 400 in the reservoir 310 fills the fuel injected into the reservoir in the reservoir 310 by the dual jet system 400 to prevent the fuel of the reservoir 310 from discharging to the outside.

As shown in FIGS. 4 and 5, the dual jet system 400 is configured to include a main jet pump 500, a sub-jet pump 600, and a connection tube 700 connecting the main jet pump 500 to the sub-jet pump 600.

As shown in FIG. 9, the main jet pump 500 may be configured to further include a main jet pump housing 510, an anti siphon check valve assembly 580 inserted into the main jet pump housing 510, and a jet pump filter 590.

The sub jet pump 600 is configured to include a sub-jet pump housing 610 and may further include the jet pump filter 590.

As shown in FIG. 7, one side of the main jet pump housing 510 is provided with at least one first jet orifice 520 jetting fuel into the reservoir 310 formed to be protruded upward.

In addition, the other side of the main jet pump housing 510 is provided with a cylindrical hollow check valve sealing part 530 protruded upward so as to have the anti siphon check valve assembly 580 inserted thereinto, while being adjacent to the first jet orifice 520.

Further, the first jet orifice 520 and the check valve sealing part 530 in the main jet pump housing 510 is interconnected by a hollow communicating tube 550.

Further, the outer peripheral surface of the check valve sealing part 530 in the main jet pump housing 510 is provided with a hollow outlet pipe 540 protruded outward.

As described above, the anti siphon check valve assembly 580 is inserted into the check valve sealing part 530 in the main jet pump housing 510.

The anti siphon check valve assembly 580 is mounted to prevent a siphon phenomenon and a reflow of fuel that are caused at the time of supplying fuel to the reservoir 310.

That is, the fuel jetted to the first jet orifice 520 is supplied through the check valve sealing part 530 and when a predetermined amount of fuel is filled in the reservoir 310, a function of the main jet pump 500 stops. In this case, since the high-pressure fuel applied to the first jet orifice 520 may reflow in the reservoir 310 due to a difference between a pressure in the reservoir 310 and a pressure in the main jet pump 500, it is possible to prevent the above-mentioned problem by mounting the anti-siphon check valve assembly 580

The lower portion of the first jet orifice 520 is formed to be depressed, such that the jet pump filter 590 may be inserted thereinto.

Since a fuel jetting aperture of the first jet orifice 520 becomes a very small due to a sudden reduction of a diameter, the first jet orifice 520 may be clogged when there are foreign materials in the jetted fuel. Therefore, the jet pump filter 590 may be mounted at the bottom in order to filter the foreign materials.

As shown in FIG. 8, in the sub-jet pump housing 610, the second jet orifice 620 jetting fuel into the reservoir 310 is formed to be protruded upward.

Further, the outer peripheral surface of the sub-jet pump housing 610 is provided with a hollow inlet pipe 630 formed to be protruded outward.

Similar to the first jet orifice 510, the bottom side of the second jet orifice 620 may be provided with the jet pump filter 590.

The outlet pipe 540 of the main jet pump housing 510 is interconnected with the inlet pipe 630 of the housing of the sub-jet pump 610 by the connection tube 700.

As shown in FIG. 5, the bottom side of the reservoir 310 is provided with a coupling groove 800 corresponding to the shape of the top side of the dual jet system 400 so that the top surface of the dual jet system 400 may be inserted into the bottom side of the reservoir 310 to be coupled with each other.

The main jet pump housing 510 is mounted to be adjacent to one edge of the bottom side of the reservoir 310 and the sub-jet pump housing 610 is mounted to be adjacent to the other edge of the bottom side of the reservoir 310. Meanwhile, the main jet pump housing 510 may be mounted to be opposite to the sub-jet pump housing 610.

Therefore, when a vehicle is travelled on a steep slope over a long period of time, even though the reservoir is inclined such that any one of the main jet pump 500 and the sub-jet pump 600 cannot suck the fuel into the reservoir 310, the remaining one main jet pump 500 or sub-jet pump 600 adjacent to the inclined reservoir can suck the fuel into the reservoir 310, such that the engine hesitation and stop phenomena of the vehicle can be prevented.

As shown in FIG. 6, when sucking the fuel into the reservoir 310 through the sub-jet pump 600, the fuel is supplied to the main jet pump 500 through the check valve sealing part 530 and is supplied to the sub-jet pump 600 through the inlet pipe 630 connected to the outlet pipe 540, such that it is jetted at high speed through the second jet orifice 620.

When sucking the fuel into the reservoir 310 through the main jet pump 500, the fuel is supplied to the main jet pump 500 through the check valve sealing part 530 and is jetted at high speed through the adjacent first jet orifice 520, such that the fuel in the fuel tank is sucked into the reservoir together with the fuel jetted at high speed.

A gap for sucking the fuel may be formed between the coupling groove 800 on the bottom side of the reservoir 310 mounted with the dual jet system 400 and the dual jet system 400 so that the fuel in the fuel tank is smoothly sucked into the reservoir 310 together with the fuel jetted at high speed through the first jet orifice 520 and the second jet orifice 620.

Therefore, as shown in FIG. 7, the top side of the communicating tube 550 of the main jet pump housing 510 is provided with a first gap forming part 560 formed to be protruded upward.

In addition, the second gap forming part 570 is formed so that the first gap forming part 560 extends in a width direction of the communicating tube 550, wherein the second gap forming part 570 is formed to be extended longer than the width of the main jet pump housing 510.

As shown in FIG. 8, the sub-jet pump housing 610 is provided with a third gap forming part 640 protruded in a horizontal direction from one predetermined area and the other predetermined area of the outer peripheral surface thereof to extend in a direction opposite to each other, wherein the third gap forming part 640 is formed to be extended longer than the width of the sub-jet pump housing 610.

The main jet pump housing 510 and the sub-jet pump housing 610 are provided with the gap for sucking the fuel between both edges in a width direction of the main jet pump housing and the sub-jet pump housing and the inner circumferential surface of the coupling groove 800 in a width direction by the second gap forming part 570 and the third gap forming part 640.

When the main jet pump housing 510 and the sub-jet pump housing 610 are inserted into the coupling groove 800, they may be provided with a separate fixing member to be easily fixed.

Therefore, both ends of the second gap forming part 570 and the third gap forming part 640 are provided with a protrusion part 571 protruded to the outside in a length direction and the predetermined area of the inner circumferential surface of the coupling groove 800 may be provided with an insertion groove 810 corresponding to the protrusion part 571 so as to be fastened to the protrusion part 571.

The method of coupling both ends in the length direction of the second gap forming part 570 and the third gap forming part 640 with the predetermined area of the inner circumferential surface of the coupling groove 800 is not limited to the above description and may be changed to more efficient methods without limitation.

As set forth above, the fuel pump module of the present disclosure can prevent the phenomenon that fuel is not smoothly filled in the reservoir due to the orifice action of the jet pump by inclining fuel to one side that is caused by the inclination of the fuel tank when a vehicle travels a steep slope section.

Further, the fuel pump module of the present disclosure can increase the fuel supply efficiency of a vehicle by preventing the engine hesitation and stop phenomena of a vehicle caused by insufficiently supplying fuel to the engine since fuel is not previously filled in the reservoir.

The present invention is not limited to the embodiment described herein and it should be understood that the present invention may be modified and changed in various ways without departing from the spirit and the scope of the present invention. Therefore, it should be appreciated that the modifications and changes are included in the claims of the present invention. 

1. A fuel pump module 1000 mounted in a fuel tank of a vehicle and supplying a predetermined amount of fuel filled therein to an engine, wherein a dual jet system 400 mounted on a bottom end of a reservoir 310 of the fuel pump module 1000 includes: a main jet pump housing 510 interconnected with at least one first jet orifice 520 and a cylindrical check valve sealing part 530 by a hollow communicating tube 550, at least one first jet orifice 520 jetting the fuel into the reservoir 310 formed at one side of the dual jet system 400 so as to be protruded upward, the cylindrical hollow check valve sealing part 530 formed to be protruded upward while being adjacent to the first jet orifice 520 so that an anti siphon check valve assembly 580 preventing a siphon phenomenon and a reflow of fuel caused at the time of supplying the fuel to the reservoir 310 is inserted into the cylindrical check valve sealing part 530; a sub-jet pump housing 610 provided with a second jet orifice 620 formed to be protruded upward in order to jet the fuel into the reservoir 310, wherein the bottom side of the reservoir 310 is provided with a coupling groove 800 corresponding to the top side of the dual jet system 400 so that the top surface of the dual jet system 400 is inserted into the bottom side of the reservoir 310 to be coupled with each other.
 2. The fuel pump module of claim 1, wherein the dual jet system 400 includes an outlet pipe 540 protrudedly formed at an outer circumferential surface of the check valve sealing part 530 and an inlet pipe 630 protrudedly formed at an outer circumferential surface of the sub-jet pump housing 610, the outlet pipe 540 and the inlet pipe 630 being interconnected by a connection tube
 700. 3. The fuel pump module of claim 2, wherein the main jet pump housing 510 is mounted to be adjacent to one edge of the bottom side of the reservoir 310 and the sub-jet pump housing 610 is mounted to be adjacent to the other edge of the bottom side of the reservoir 310, the main jet pump housing 510 and the sub-jet pump housing 610 being mounted to be opposite to each other.
 4. The fuel pump module of claim 1, wherein the top side of the communicating tube 550 is provided with a first gap forming part 560 formed to be protruded upward.
 5. The fuel pump module of claim 4, wherein the main jet pump housing 510 is provided with a second gap forming part 570 so that the first gap forming part 560 extends in a width direction of the communicating tube 550, the second gap forming part 570 being formed to be extended longer than the width of the main jet pump housing
 510. 6. The fuel pump module of claim 5, wherein the sub-jet pump housing 610 is provided with a third gap forming part 640 protruded in a horizontal direction from one predetermined area and the other predetermined area of the outer peripheral surface thereof to extend in a direction opposite to each other, the third gap forming part 640 being formed to be extended longer than the width of the sub-jet pump housing
 610. 7. The fuel pump module of claim 6, wherein both ends of the second gap forming part 570 and the third gap forming part 640 are provided with a protrusion part 571 protruded to the outside in a length direction and the predetermined area of the inner circumferential surface of the coupling groove 800 is provided with an insertion groove 810 corresponding to the protrusion part 571 so as to be fastened to the protrusion part
 571. 